This book focuses on cities, their relationships with each other and the disparities between them. Analysing cities as the places where diversity is especially apparent, where cultural richness is experienced and where conflicts often erupt, it illustrates how cultures and cultural diversity...

We develop a model where the unemployed workers in the city can find a job either directly or through weak or strong ties. We show that, in denser areas, individuals choose to interact with more people and meet more random encounters (weak ties) than in sparsely populated areas. We also...